Design and Test of Combined Air Suction Cotton Breed Seeder

Table 5

Variance analysis of missing index.

Source of variance	Quadratic sum	Degree of freedom	Mean square error	F	P
Model	10.37	9	1.15	20.55	0.0003
X1	2.53	1	2.53	45.14	0.0003
X2	2.31	1	2.31	41.22	0.0004
X3	1.45	1	1.45	25.77	0.0014
X1X2	0.0400	1	0.0400	0.7134	0.4262
X1X3	0.0225	1	0.0225	0.4013	0.5466
X2X3	0.4225	1	0.4225	7.54	0.0287
	0.3184	1	0.3184	5.68	0.0487
	2.53	1	2.53	45.10	0.0003
	0.8526	1	0.8526	15.21	0.0059
Residual error	0.3925	7	0.0561
Lack of fit	0.3925	3	0.1308
Error	0.0000	4	0.0000
Total	10.76	16

Significant difference (). Extremely significant difference ().